What is the problem with moveToThread() ?

blue_sky

here is the simple code I am sharing. After running this..gives me
<warning: Exception at 0x754c812f, code: 0x406d1388: Startup complete, flags=0x0 (first chance)>

@
main.cpp
=======-
#include "SafeThreadDesign.h"
#include <QApplication>
#include <QThread>
#include <QDebug>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
SafeThreadDesign w;
qDebug()<<"Inside main : thread Id is :"<<QThread::currentThreadId();
w.show();

return a.exec&#40;&#41;;

}
SafeThreadDesign.cpp

#include "SafeThreadDesign.h"
#include "ui_SafeThreadDesign.h"
#include "QThread"
#include "Worker.h"
#include <QDebug>

SafeThreadDesign::SafeThreadDesign(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::SafeThreadDesign)
{
ui->setupUi(this);
qDebug()<<"Inside constructor SafeThreadDesign : thread Id is :"<<QThread::currentThreadId();
startNewThread();
}

SafeThreadDesign::~SafeThreadDesign()
{
delete ui;
}

void SafeThreadDesign::startNewThread()
{
qDebug()<<"Inside SafeThreadDesign::startNewThread() : thread Id is :"<<QThread::currentThreadId();
t = new QThread( this );
workerObj = new Worker( );
workerObj->moveToThread( t );
connect( t,SIGNAL(started()),workerObj,SLOT( startNewThread()), Qt::DirectConnection );
//connect( workerObj,SIGNAL(fnshd()),t,SLOT(quit()) );
t->start();
}
SafeThreadDesign.h
===================--
#include <QMainWindow>
#include <QThread>
#include <Worker.h>
namespace Ui {
class SafeThreadDesign;
}

class SafeThreadDesign : public QMainWindow
{
Q_OBJECT

public:
explicit SafeThreadDesign(QWidget *parent = 0);
~SafeThreadDesign();

private:
Ui::SafeThreadDesign ui;
private slots:
void startNewThread();
public:
QThread t;
Worker* workerObj;
};
worker.cpp

#include "Worker.h"
#include <QDebug>
#include <QThread>
Worker::Worker()
{
}

void Worker::startNewThread()
{
qDebug()<<"Inside starting : thread Id is :"<<QThread::currentThreadId();

}
worker.h

#include <QObject>

class Worker : public QObject
{
Q_OBJECT
public:
Worker();
private slots:
void startNewThread();
};
@

Where is the problem?Please need help

dbzhang800

Hi, please wrap your code with

@@@

and

@@@

Asperamanca

You are attempting a direct connection between two object which are not in the same thread. That's not possible.

blue_sky

Thank You
[quote author="1+1=2" date="1385964173"]Hi, please wrap your code with

@@@

and

@@@[/quote]

blue_sky

then how moveToThread() works..example?

[quote author="Asperamanca" date="1385969870"]You are attempting a direct connection between two object which are not in the same thread. That's not possible.[/quote]

Asperamanca

One example can be found "linked from this post":http://qt-project.org/forums/viewthread/14806

blue_sky

i tried without direct connection, same result..please suggest.

[quote author="Asperamanca" date="1385969870"]You are attempting a direct connection between two object which are not in the same thread. That's not possible.[/quote]

dbzhang800

Hi, can you make sure that your connection is successful?

The return value of connect is true or false?

What is the problem with moveToThread() ?

} SafeThreadDesign.cpp

private: Ui::SafeThreadDesign ui; private slots: void startNewThread(); public: QThread t; Worker* workerObj; }; worker.cpp

} worker.h

class Worker : public QObject { Q_OBJECT public: Worker(); private slots: void startNewThread(); }; @

}
SafeThreadDesign.cpp

private:
Ui::SafeThreadDesign ui;
private slots:
void startNewThread();
public:
QThread t;
Worker* workerObj;
};
worker.cpp

}
worker.h

class Worker : public QObject
{
Q_OBJECT
public:
Worker();
private slots:
void startNewThread();
};
@